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The SEEK (Sporadic‐ E Experiment over Kyushu) Campaign
Author(s) -
Fukao Shoichiro,
Yamamoto Mamoru,
Tsunoda Roland T.,
Hayakawa Hajime,
Mukai Toshifumi
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl00932
Subject(s) - sporadic e propagation , sounding rocket , rocket (weapon) , wind shear , radar , altitude (triangle) , mesosphere , depth sounding , geology , geophysics , backscatter (email) , electric field , meteorology , thermosphere , ionosphere , atmospheric sciences , physics , wind speed , aerospace engineering , stratosphere , astronomy , telecommunications , oceanography , geometry , mathematics , quantum mechanics , computer science , engineering , wireless
The SEEK (Sporadic‐ E Experiment over Kyushu) campaign was conducted in late August 1996 from the southern region of Kyushu, Japan, to investigate the mechanism for the generation of quasi‐periodic (QP) radar backscatter from field‐aligned irregularities imbedded in nighttime sporadic‐ E ( Es ) layers. SEEK was designed to determine in‐situ small‐scale electrodynamical properties using two sounding rockets and large‐scale dynamics and electrodynamics using ground‐based sensors, which included a transportable radar and other radio and optical instruments deployed in the vicinity of the rocket range. It was observed by this campaign that Es layers existed in a convergent wind shear region, where large electric fields were induced and when active atmospheric gravity waves existed in the mesosphere. However, there was little evidence which positively supported the hypothesis that Es layers were deeply modulated in altitude.